Method for resource allocation, method for channel state information transmission, base station and user equipment

Abstract

A method for resource allocation, method for channel state information transmission, base station and user equipment. Wherein the method for resource allocation includes: determining, by a base station, that it is necessary for a UE to report aperiodic CSI of relevant downlink CCs; and allocating, by the base station, corresponding resources to the UE according to the number of the relevant downlink CCs. The base station allocates corresponding resources to the UE in accordance with the number of relevant downlink CCs, resource allocation is flexible, and the transmission of UCI in case of multiple carriers is supported.

What is claimed is: 
     
       1. A base station, comprising:
 a control circuit configured to:
 allocate corresponding resources to a user equipment according to a number of relevant downlink component carriers of which the user equipment should perform an aperiodic reporting of channel status information, 
 allocate maximum resources of a first number to the user equipment when the user equipment should perform the aperiodic reporting of channel status information of one downlink component carrier, and 
 allocate maximum resources of a second number to the user equipment when the user equipment should perform the aperiodic reporting of channel status information of more than one downlink component carrier; and 
 a transmitter configured to transmit downlink control information to the user equipment, 
 wherein the downlink control information further comprises an index of coding and modulation scheme, wherein resources are allocated to the user equipment by the base station according to the number of the relevant downlink component carriers, and wherein the user equipment is further configured to perform aperiodic transmission of channel status information according to triggering information, the index of coding and modulation scheme and used resources contained in the downlink control information. 
 
 
     
     
       2. The base station according to  claim 1 , wherein the first number is 4. 
     
     
       3. The base station according to  claim 1 , wherein the second number is greater than the first number, and the first number and the second number are determined according to a Channel Coding Rate (CCR). 
     
     
       4. A user equipment, comprising:
 a receiver configured to receive downlink control information transmitted by a base station, the downlink control information comprising triggering information which indicates whether to perform an aperiodic reporting of channel status information of relevant downlink component carriers, and when indicated to perform the aperiodic reporting of channel status information of the relevant downlink component carriers, the downlink control information indicates an index and number of the relevant downlink component carriers, 
 wherein the maximum number of resources allocated by the base station to the user equipment is a first number if the user equipment should perform the aperiodic reporting of channel status information of one downlink component carrier; and the maximum number of the resources allocated by the base station to the user equipment is a second number if the user equipment should perform the aperiodic reporting of channel status information of more than one downlink component carrier; 
 a transmitter configured to aperiodically transmit the channel status information according to the triggering information, 
 wherein the downlink control information further comprises an index of coding and modulation scheme, wherein resources are allocated to the user equipment by the base station according to the number of the relevant downlink component carriers, and wherein the transmitter is configured to perform the aperiodic transmission of channel status information according to the triggering information, the index of coding and modulation scheme and used resources contained in the downlink control information. 
 
     
     
       5. The user equipment according to  claim 4 , wherein the first number is 4. 
     
     
       6. The user equipment according to  claim 4 , wherein the second number is greater than the first number, and the first number and the second number are determined according to a Channel Coding Rate (CCR). 
     
     
       7. A communication system, comprising:
 a base station which includes a control circuit configured to allocate corresponding resources to a user equipment according to a number of relevant downlink component carriers of which the user equipment should perform an aperiodic reporting of channel status information; and 
 the user equipment which includes a receiver configured to receive downlink control information transmitted by the base station, the downlink control information comprising triggering information which indicates to the user equipment whether to perform the aperiodic reporting of channel status information of relevant downlink component carriers and when indicated to perform the aperiodic reporting of channel status information of the relevant downlink component carriers, the downlink control information indicates an index and number of the relevant downlink component carriers, and a transmitter configured to perform an aperiodic transmission of channel status information according to the triggering information; and 
 the control circuit of the base station is further configured to allocate 
 maximum resources of a first number to the user equipment if the user equipment should perform the aperiodic reporting of channel status information of one downlink component carrier, and 
 to allocate maximum resources of a second number to the user equipment if the user equipment should perform the aperiodic reporting of channel status information of more than one downlink component carriers, 
 wherein the downlink control information further comprises an index of coding and modulation scheme, wherein resources are allocated to the user equipment by the base station according to the number of the relevant downlink component carriers, and wherein the transmitter is further configured to perform the aperiodic transmission of channel status information according to the triggering information, the index of coding and modulation scheme and used resources contained in the downlink control information. 
 
     
     
       8. The system according to  claim 7 , wherein the first number is 4. 
     
     
       9. The system according to  claim 7 , wherein the second number is greater than the first number, and the first number and the second number are determined according to a Channel Coding Rate (CCR).